Absconding renter (3-2-5)

I believe the answer is:

fly-by-night

(Other definitions for fly-by-night that I've seen before include "Cowboy" , "Unreliable, untrustworthy" , "Unreliable, shady" , "Unreliable - person who departs secretly to avoid debts" , "Untrustworthy person, likely to abscond" .)

I've seen this clue in the Sydney Morning Herald.

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